陆旭老师，我有一些做过的assumption题目取非的句子搞不清，你能帮忙看下吗(不说这道题目的解题思路，单纯就是取非问题，特别是双重否定或者从句里面有否定词） 1.No part of a person’s brain that is damaged by a stroke ever recovers.---> some part of a person's brain that is damaged by a stroke ever recovers. 2.Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain.这个句子我不太会取非，正过来说这个句子就是Impairment of linguistic capabilities occurs in people who have suffered any damage to any language center of the brain.那么我取非是Impairment of linguistic capabilities occurs in people who have not suffered any damage to any language center of the brain. 3.If there are language centers on the left side of the brain, any serious stroke affecting that side of the brain damages at least one of them. 取非If there are language centers on the left side of the brain, any serious stroke affecting that side of the brain damages nothing of them. 4.这题出现两个not The collection fee will not significantly affect the purchasing power of most residents, even if their households do not reduce the amount of trash they put out. 我取非直接去前面的not: The collection fee will significantly affect the purchasing power of most residents, even if their households do not reduce the amount of trash they put out. 5.这个也差不多 Not all steel producers were unaffected by country A’s newly imposed tariffs. 我取非All steel producers were unaffected bycountry A’s newly imposed tariffs. 6.There are no plants native to western Africa that, if domesticated, could serve as staple food crops. 这个if domesticated是不是可以不管，直接改成There are some plants native to western Africa that, if domesticated, could serve as staple food crops.

请问这道题C选项and前后为什么可以是并列关系？

为什么选A？and之后的instead come是跟will avoid 并列嘛？还有就是 SVO+doing的形式到底能不能用？怎么用？

请问老师 画线部分这句话怎么没有谓语呢？我想了很久是省略了have been? 如果是这样的话，我发现省略的情况会影响我的阅读，可能是我对英文省略这块的语法不熟悉（什么时候可以省略，哪些可以省略等）老师能发我一些关于省略语法的资料我读读嘛，谢谢

从句不知道修饰谁的问题，有就近修饰的说法吗？怎么判断修饰谁呢：第一句 状语从句Where……打括号部分修饰museum还是Italy，说修饰Italy好像也翻译的通；第二句 that引导的从句 打括号部分修饰rationale还是social and political realities？在句中作什么成分呢; 第三句 that从句修饰evidence还是前面的Middle East？从句中的with和but怎么连在一起用呢

求问这个题，麻烦老师简明扼要解答一下 谢谢～

请问老师 如果是the Audubon society and other conversation groups发出的动作，为什么是concerned 不是concerning？画线部分是在句中是什么成分呢

DS. Is the integer n a multiple of 140? 1. N is multiple of 10. 2. N is mutual old of 14. @May老师 这到底在数学基础课里 请问题目里说integer 那么integer 也可以有负数 所以 E的答案 这样理解可以吗。